difference velocity field

difference velocity principle

jet with velocity difference

Modular Velocity Difference

multiple velocity difference

ratio of peripheral velocity difference

velocity difference of two channels

Analysis of difference of velocity

difference interval velocity

average velocity， mean velocity

group velocity and phase velocity

ratio of pulp velocity and sire velocity

velocity derived from velocity spectrum

closed difference of height difference

difference in difference

difference in difference (DD) method

Difference-in-difference

log mean temperature difference; logarithmic mean temperature difference

logarithmic mean temperature difference; log mean temperature difference